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Alternate Processes for ASTM 633 Type 2




I am looking for an alternate to black chromate copper pipe per ASTM B633. The process/method must be black in color and have a hardened finish.

Jared Wingers
- Marinette, Wisconsin
2003


I'm not sure what you want. ASTM B633, Type II is for electroplated zinc on steel, with a colored chromate coating. You may want MIL-F-495E FINISH, CHEMICAL, BLACK, FOR COPPER ALLOYS, available from the Defence Department: http://assist.daps.dla.mil/quicksearch/. This spec. includes tests for flexibility (adhesion) and weathering, but not hardness. This coating can be coated with lacquer.

Ken Vlach [deceased]
- Goleta, California
contributor of the year Finishing.com honored Ken for his countless carefully researched responses. He passed away May 14, 2015.
Rest in peace, Ken. Thank you for your hard work which the finishing world, and we at finishing.com, continue to benefit from.
2003




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